izzum\statemachine\persistence\PDO::addHistory PHP Метод

    public function addHistory(Identifier $identifier, $state, $message = null, $is_exception = false)
    {
        $connection = $this->getConnection();
        $prefix = $this->getPrefix();
        try {
            $query = 'INSERT INTO ' . $prefix . 'statemachine_history
                    (machine, entity_id, state, message, changetime, exception)
                        VALUES
                    (:machine, :entity_id, :state, :message, :timestamp, :exception)';
            $statement = $connection->prepare($query);
            $machine = $identifier->getMachine();
            $entity_id = $identifier->getEntityId();
            $timestamp = $this->getTimestampForDriver();
            $is_exception = $this->getBooleanForDriver($is_exception);
            $statement->bindParam(":machine", $machine);
            $statement->bindParam(":entity_id", $entity_id);
            $statement->bindParam(":state", $state);
            if ($message) {
                if (is_string($message)) {
                    $info = new \stdClass();
                    $info->message = $message;
                    $message = $info;
                }
                //always json encode it so we can pass objects as the message and store it
                $message = json_encode($message);
            }
            $statement->bindParam(":message", $message);
            $statement->bindParam(":timestamp", $timestamp);
            $statement->bindParam(":exception", $is_exception);
            $result = $statement->execute();
            if ($result === false) {
                throw new Exception($this->getErrorInfo($statement));
            }
        } catch (\Exception $e) {
            throw new Exception(sprintf('query for updating state failed: [%s]', $e->getMessage()), Exception::PERSISTENCE_LAYER_EXCEPTION);
        }
    }